← Back to Blog

Extended Reach Drilling

Extended Reach Drilling (ERD) describes an extreme form of Directional drilling that achieves horizontal well departures beyond the conventional, or achieves particularly challenging geometries of a well in terms of horizontal versus vertical offsets from the surface location. The aim of ERD are either to reach a larger area from one surface drilling location, or to keep a well for a longer distance in a reservoir in order to maximise its productivity and drainage capability. The challenges in ERD are in cleaning of the hole and managing of the significant torsion in the drill string as well as any buckling of drill string or casing that is caused by the well geometry and length. It therefore uses special equipment. What exactly determines a well to be "extended reach" various over time and location with the development of technologies and of experiences. In 1981, a horizontal outstep of 5000 feet from the surface location was considered "extended reach", whilst in recent years over 40,000 feet outstep are achieved....

Please log in to view
the rest of this report.

Not yet a subscriber?
Contact us today!

If you do not yet have an account with us and would like to register or find out more, please contact us using our client services form, send an email to admin@petrologica.com or call us on +44(0)1206 823 295.

by Yue Pan // 11 November, 2015

←   Back to Blog